Sewing-machine.



1 KTENTBD MAY '7, 1907.

e. LEWIS. SEWING MACHINE.

APPLICATION FILED MAY 6, 1903.

3 SHEETS-SHEET 2.

John G. Lewis No. 852,967. PATENTED MAY 7, 1907.

- J. G. LEWIS.

SEWING MACHINE.

APPLICATION FILED MAY 6, 1903.

3 SKEBTSrSHEBT 3.

John Lewis UNITED STAESZiENT OFFICE.

JOHN GATES LEWIS, OF ST. LOUIS, MISSOURI, ASSIGNOR TO LEWIS BLIND- OF MISSOURI.

Specification of Letters Patent.

CORPORATION SEWING-MACHINE.

Patented May 7, 1907.

Original application filed January 27, 1900, Serial No. 2,941. Divided and this application filed May 6, 1903. Serial No. 165 ,859.

To all whom it may concern.-

Be it known that I, J our: GATES LEwis, a citizen of the United States, residing at the city of St. Louis, in the State of Missouri, have invented a certainnew and useful Sewin -Machine, of which the following is such a full, clear, and exact description'as will enable any one skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, forming part of this specification.

This application is a divislon of application No. 2,941, filed January 27,1900, and relates more particularly to that class of sewmeans to vary the depth of the thrust of said needle. I

My invention also consists in certain other novel features and details of construction, all of which are described in the following specification, and pointed out in the claims affixed hereto.

' 1n the accompanying drawings which illustrate so much of one form of sewing machine as is necessary to disclose my invention, Figure 1 is an end view; Fig.2 is a diagrammatic view, showing a detail, Fig. 3 is a front view, the arm being removed to better show the remaining parts, and Fig. 4 is a side elevation of the hook mechanism, the casing being in section.

Like marks of reference refer to similar parts in the several views of the drawings.

5 is the bed. plate of the machine. The bed plate 5 is preferably provided with downwardly extending flanges 6 which. are adapt ed to enter an opening in a suitable table 7 and thus hold the machine in place on said table. Carried by the .bed plate 5, and preferably formed integral therewith, is a main casing or housing 8 in which is journaled the main or driving shaft 9 of the machine. The main or driving shaft 9 may be provided 12 are two arms 15 in which is slidingly I mounted the needle bar 16. Secured to the needle bar 16 is a collar 17 to which is pivoted one end of the link 18, the other end of which is pivoted to a lever 19. The lever 19 is pivoted at 20 to a downwardly extending bracket 21 carried by the bed plate 5; the end of the lever 19 is secured by a ball and socket joint 22 to one end of a rod .28, the other end of which is provided with an eccentric strap 24 surrounding an eccentric on the main shaft 9. The rotary motion of the shaft 9 is changed to a longitudinal motion by the eccentric and communicated through the rod 23', lever 19 and link 18 to the needle bar 16 which is thus caused to reciprocate '27 to a vibrating segment 28 actuated by a switch cam 29 on the main shaft 9. The motion of the main shaft 9 is ,thus communicated through the cam 29, segment 28, arm 26 and rock shaft 12 to the needle bar 16 which is thus caused to vibrate laterally. The use of, the link 18 enables the needle bar 12 to be reciprocated laterally without interfering with its thrust. The link 18 also causes the needle bar to have a greater thrust when it is moved away from the center of the hook mechanism, as is shown in Fig. 2. This insures the enga ement of the hook with the needle loop which otherwise might not take place on account of the hook passing the needle at a higher point in this position than when the needle bar is in the center of the hook mechanism.

It will thus be seen that the use of the link 18 insures the proper height of the needle at the time of taking the loop, and in order to insure the loop being perfectly formed the hook is made to rotate twice during each stroke of the needle. It will be evident that if the hook rotated'at the same s eed asthe eccentric operating the needle, t lat is, if the hook made one rotation to each thrust of the needle the loop would be more perfectly formed dursition of the needle as shown in full and dotted lines in Fig. 2. However, by making the hook rotate twice to each thrust of the needle this distance is only one half as great and in practice this reduces it to such a small amount that it does not interfere with the proper formation of the loop.

From the above it will be evident that I obtain compensation for both the time and the curvature of the hook and at the same time allow the hook to remain in the same center and plane of rotation. In other words, I do not find it necessary to move the hook either laterally or longitudinally with the lateral vibration of the needle.

Secured to the end of the main shaft 9 is a spiral gear 30 which meshes with a spiral gear 31 shown in dotted lilies in Fig. 1 which drives a rotary hook mechanism 35. This rotary hook mechanism 35 is contained in a hook case 32. The said rotary hook mechanism 35 is provided with a beak 33 and is situated within the casing 32 as best shown in Fig. 4 so that its rear face will co-operate with a needle 34 carried by the needle bar 16. Owing to this arrangement the beak 33 takes the loop from the front side of the needle 34 and thus prevents the thread from wrapping around theneedle which it would do it the loop was taken tom the rear side of the needle. Loosely mounted in the hook mechanism 35 is a bobbin case 36. The bobbin case 36 is provided with a detent 37 which engages with a recess 38 in the hook case 32 and this prevents the bobbin case from rotating with the hook mechanism 35. The spiral gears 30 and 31 are of such roportions as to cause the rotary hook mec anlsm 35 to re volve twice to each stroke of the needle bar 16.

Having fully described my invention, what I claim as new and desire to secure by Letters Patent of the United States, is:

1. In a sewing machine, a reciprocating and laterally vibrating needle, a cooperating looper, and means for maintaining the co-operative relation between the eye of the needle and the beak of the looper in the different lateral positions by varying the distance of passage of the eye of the needle beyond the beak of the looper.

2. In a sewing machine, a rotary hook mechanism arranged to remain in the same center of rotation, a laterally reciprocating needle, and means for varying the depth. of the thrust of said needle.

3. In a sewing machine, a reciprocating l and laterally vibrating needle, a cooperating rotary hook, and means for maintaining the cooperative relation between. the eye of the needle and the beak of the hook by varying the distance of )assage of the eye of the needle beyond the beak of the hook.

4. In a sewing machine, a reciprocating and laterally vibrating needle, a cooperating rotary hook, and means for maintaining the cooperative relation between the eye of the needle and the beak of the hook by varying. the depth of thrust of the needle.

5. In a sewing machine, a reciprocating and laterally vibrating needle, a cooperative looper moving in a plane parallel to the path of reciprocation of said needle, and means for maintaining the cooperative relation between the eye of the needle and the beak of the looper in the different lateral positions by varying the distance of passage of the eye of the needle beyond the beak of the looper.

6. In a sewing machine, a reciprocating and laterally vibrating needle, a cooperating of reciprocation of said. needle, and means for maintaining the cooperative relation between the eye of the needle and the beak of the looper in thc di'll'orent lateral positions by varying the depth of thrust of the needle.

7. In a sewing machine, a looper, a laterally vibrating needle, a rcciprocat-ing mem ber, and a link connecting said reciprocating member and needle, whereby the depth of thrust of said needle is varied by its lateral vibration to maintain cooperative relation between the eye of the needle and the beak of the looper in the di'll'erent lateral positions.

8. In a sewing machine, a rotary hook, a laterallyvibrating needle, a reciprocating member, and a link connecting said reciprocating member and needle, whereby the depth of thrust of said needle is varied by its lateral vibration to maintain cooperative relation between the eye of the needle and the beak of the hook in the dill'erent lateral positions.

9. In a sewing macl'iine, a reciprocating and laterally vibrating needle, a looper moving in a plane substantially parallel to the path of reciprocation of said needle, a reciprocating member, and a link connecting said reciprocating member and needle, whereby the depth of thrust of said needle is varied by its lateral reciprocation to maintain cooperative relation between the eye of the needle and the beak of the looper in the di'll'erent lateral positions.

10. In a sewingmachine, a needle, means for reciprocating said needle longitudinally, a rotary hook mechanism arranged to rotate in a plane substantially parallel with the needle, said needle cooperating with the rear side oi said rotary hook mechanism, a bobbin case within said rotary hook mechanism, means for rotating said rotary hook mechanism looper moving ina plane parallel to the path I and a loop e -with means whereby the vertical working of the hook in different lateral positions by twice to each stroke of the needle, and means 1 for reciprocating said needle laterally.

1]. In a sewing machine having a vertical reciprocating andlaterallyvibrating needle, the eye of the .needle and the hook of the loopcr having a certain relation in -one cooperative position; in combination position of the needle is either raised or lowered accordingly as the lateral position of the needle is changed from one to the other side of the said first named cooperative position.

12. In a sewing machine, a needle, means for vibrating said needle laterally, a rotary hook arranged to remain in the same center of rotation, and means for rotating said hook twice .to each thrust of said needle.

13. In a sewing'machine, a reciprocating and laterally vibrating needle, a hook, and means for moving said hook at constant speed, said needle and hook cooperating at ifierent points in the path of rotation of said hook.

14:. In a sewing machine, a reciprocating and laterally vibrating needle, a hook,.means for moving said hook at constant speed, and means for maintaining cooperative relation between the eye of the needle and the beak varying the distance of passa e of the eyes of the needle beyond the beak 01 the hook.

15. In a sewing machine, a reciprocating and laterally vibrating needle, a rotary hook arranged to cooperate with said needle at different points in the path of the beak of the hook, and means for rotating said hook a plurality of times to each thrust of the needle.

16. In a sewing machine, a reciprocating and laterally vibrating needle, a rotary hook, means for rotating said hook a plurality of times to each thrust of the needle, and means for varying the distance of passage of the eye of the needle beyond the beak of the hook.

17. In a sewing machine, a reciprocating and laterally vibrating needle, a rotary hook arranged to remain in the same center of rotation and to cooperate with said needle at different points in the path of the beak of said hook, and means for rotating said hook a plurality of times to each thrust of said needle.

18. In a sewing machine, a reciprocating and laterally vibrating needle, a rotary hook arranged to remain in the same center of rotation, means for rotating said hook a plurality of times to each thrust of the needle, andmeans for varying the distance of passage of the eye of the needle beyond the beak of the hook.

19. In a sewing machine, areciprocating and laterally vibrating needle, a rotary hook arranged .to remain in the same center of rotation, means for rotating said hook a plurality of times to each thrust of said needle. and means for varying the thrust of said needle.

20. In a sewing machine, a reciprocating and laterally vibrating needle, a rotary hook arranged to remain in the same center of rotation, means for rotating said hook a plurality of times to eachthrust of said needle, and a link connection for varying the thrust of said needle.

21. In a sewing machine, a reciprocating and laterally vibrating needle, a hook, means for moving said hook at constant speed, and means for maintaining cooperative relation between the eye of the needle and the beak of the hook by varying the depth of thrust of the needle.

22. In a sewing machine, a reciprocating and laterally vibrating needle, a hook, means for moving said hook at constant speed, said needle and hook cooperating at different points in the path of movement of the hook,

and means for maintainin cooperative relation between the eye of t e needle and the beak of the hook in different lateral ositions by varying the distance of passage 0 the needle beyond the beak of the hook.

23. In a sewing machine, a looper, a reciprocating and laterally vibrating needle, and means automatically controlled by the lateral vibration of said needle for varying the distance of passage of the eye of the needle beyond the beak of the looper.

24. In a sewing machine, a looper, a reciprocating and laterally vibrating needle, and means automatically controlled by the lateral vibration of said needle for varying the depth of thrust of the needle. I

25. In a sewin machine, a needle, means for vibrating sai needle laterally, a rotary hook arranged to remain in the same center of rotation and cooperating with said needle at each thrust of said needle, and means for rotating the said hook twice to each thrust of said needle.

26. In a sewing machine,. a needle having a plurality of paths of reciprocation, and a rotary hook cooperating with said needle at the same speed at a plurality of points in the circumferential path of said hook.

27. In a sewing machine, a needle having a plurality of pat s of reciprocation, a rotary hook cooperating with said needle at the same speed at a plurality of points in the path of said hook, and means for rotating said hook a plurality of times to each thrust of said needle. In testimony whereof, I have hereunto set my hand and afiixed my seal, in the presence of two subscribin witnesses.

JOHN ATES LEWIS. Witnesses:

W.A. ALEXANDER, WM. T. JoNEs. 

